package com.lkd.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.google.common.base.Strings;
import com.google.common.collect.Lists;
import com.lkd.common.VMSystem;

import com.lkd.config.ConsulConfig;
import com.lkd.config.TopicConfig;
import com.lkd.contract.*;

import com.lkd.dao.VendingMachineDao;

import com.lkd.emq.MqttProducer;
import com.lkd.entity.*;
import com.lkd.exception.LogicException;
import com.lkd.http.vo.CreateVMReq;
import com.lkd.service.*;

import com.lkd.utils.DistributedLock;
import com.lkd.utils.UUIDUtils;
import com.lkd.vo.Pager;
import com.lkd.vo.SkuVO;
import com.lkd.vo.VmVO;
import lombok.extern.slf4j.Slf4j;

import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
public class VendingMachineServiceImpl extends ServiceImpl<VendingMachineDao, VendingMachineEntity> implements VendingMachineService {

    @Autowired
    private NodeService nodeService;

    @Autowired
    private ChannelService channelService;

    @Autowired
    private VmTypeService vmTypeService;

    @Override
    @Transactional(rollbackFor = {Exception.class})
    public boolean add(CreateVMReq vendingMachine) {
        VendingMachineEntity vendingMachineEntity = new VendingMachineEntity();
        vendingMachineEntity.setNodeId(Long.valueOf(vendingMachine.getNodeId()));
        vendingMachineEntity.setVmType(vendingMachine.getVmType());
        NodeEntity nodeEntity = nodeService.getById(vendingMachine.getNodeId());
        if (nodeEntity == null) {
            throw new LogicException("所选点位不存在");
        }
        //复制属性
        BeanUtils.copyProperties(nodeEntity, vendingMachineEntity);
        vendingMachineEntity.setCreateUserId(Long.valueOf(vendingMachine.getCreateUserId()));
        vendingMachineEntity.setInnerCode(UUIDUtils.getUUID());
        vendingMachineEntity.setClientId(UUIDUtils.generateClientId(vendingMachineEntity.getInnerCode()));
        this.save(vendingMachineEntity);
        //创建货道数据
        createChannel(vendingMachineEntity);
        return true;
    }


    /**
     * 创建货道
     *
     * @param vm
     * @return
     */
    private boolean createChannel(VendingMachineEntity vm) {
        VmTypeEntity vmType = vmTypeService.getById(vm.getVmType());
        List<ChannelEntity> channelList = Lists.newArrayList();
        for (int i = 1; i <= vmType.getVmRow(); i++) {
            for (int j = 1; j <= vmType.getVmCol(); j++) {
                ChannelEntity channel = new ChannelEntity();
                channel.setChannelCode(i + "-" + j);
                channel.setCurrentCapacity(0);
                channel.setInnerCode(vm.getInnerCode());
                channel.setLastSupplyTime(vm.getLastSupplyTime());
                channel.setMaxCapacity(vmType.getChannelMaxCapacity());
                channel.setVmId(vm.getId());
                channelList.add(channel);
            }
        }
        channelService.saveBatch(channelList);
        return true;
    }


    @Override
    public boolean update(Long id, Long nodeId) {
        VendingMachineEntity vm = this.getById(id);
        if (vm.getVmStatus() == VMSystem.VM_STATUS_RUNNING)
            throw new LogicException("改设备正在运营");
        NodeEntity nodeEntity = nodeService.getById(nodeId);
        BeanUtils.copyProperties(nodeEntity, vm);
        return this.updateById(vm);
    }


    @Override
    public Pager<String> getAllInnerCodes(boolean isRunning, long pageIndex, long pageSize) {
        com.baomidou.mybatisplus.extension.plugins.pagination.Page<VendingMachineEntity> page = new com.baomidou.mybatisplus.extension.plugins.pagination.Page<>(pageIndex, pageSize);

        QueryWrapper<VendingMachineEntity> qw = new QueryWrapper<>();
        if (isRunning) {
            qw.lambda()
                    .select(VendingMachineEntity::getInnerCode)
                    .eq(VendingMachineEntity::getVmStatus, 1);
        } else {
            qw.lambda()
                    .select(VendingMachineEntity::getInnerCode)
                    .ne(VendingMachineEntity::getVmStatus, 1);
        }
        this.page(page, qw);
        Pager<String> result = new Pager<>();
        result.setCurrentPageRecords(page.getRecords().stream().map(VendingMachineEntity::getInnerCode).collect(Collectors.toList()));
        result.setPageIndex(page.getCurrent());
        result.setPageSize(page.getSize());
        result.setTotalCount(page.getTotal());

        return result;
    }

    @Override
    public Pager<VendingMachineEntity> query(Long pageIndex, Long pageSize, Integer status, String innerCode) {
        com.baomidou.mybatisplus.extension.plugins.pagination.Page<VendingMachineEntity> page
                = new com.baomidou.mybatisplus.extension.plugins.pagination.Page<>(pageIndex, pageSize);
        LambdaQueryWrapper<VendingMachineEntity> queryWrapper = new LambdaQueryWrapper<>();
        if (status != null) {
            queryWrapper.eq(VendingMachineEntity::getVmStatus, status);
        }
        if (!Strings.isNullOrEmpty(innerCode)) {
            queryWrapper.likeLeft(VendingMachineEntity::getInnerCode, innerCode);
        }
        this.page(page, queryWrapper);

        return Pager.build(page);
    }


    @Override
    public VmVO findByInnerCode(String innerCode) {
        LambdaQueryWrapper<VendingMachineEntity> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(VendingMachineEntity::getInnerCode, innerCode);
        VendingMachineEntity vm = this.getOne(queryWrapper);
        VmVO vmVO = new VmVO();
        BeanUtils.copyProperties(vm, vmVO);
        vmVO.setNodeAddr(vm.getNode().getAddr());//地址
        vmVO.setNodeName(vm.getNode().getName());//名称
        return vmVO;
    }


    @Override
    public boolean updateStatus(String innerCode, Integer status) {
        try {
            UpdateWrapper<VendingMachineEntity> uw = new UpdateWrapper<>();
            uw.lambda()
                    .eq(VendingMachineEntity::getInnerCode, innerCode)
                    .set(VendingMachineEntity::getVmStatus, status);
            this.update(uw);

        } catch (Exception ex) {
            log.error("updateStatus error,innerCode is " + innerCode + " status is " + status, ex);
            return false;
        }
        return true;
    }


    @Override
    public List<SkuVO> getSkuListByInnerCode(String innerCode) {
        //获取货道列表
        List<ChannelEntity> channelList = channelService.getChannelesByInnerCode(innerCode).stream()
                .filter(c -> c.getSkuId() > 0 && c.getSku() != null).collect(Collectors.toList());
        //获取有商品的库存余量
        Map<SkuEntity, Integer> skuMap = channelList.stream()
                .collect(Collectors.groupingBy(
                        ChannelEntity::getSku,
                        Collectors.summingInt(ChannelEntity::getCurrentCapacity)));//对库存数求和
        return skuMap.entrySet().stream().map(entry -> {
                    SkuEntity sku = entry.getKey(); //查询商品
                    SkuVO skuVO = new SkuVO();
                    BeanUtils.copyProperties(sku, skuVO);
                    skuVO.setImage(sku.getSkuImage());//图片
                    skuVO.setCapacity(entry.getValue());
                    skuVO.setRealPrice(sku.getPrice());//真实价格
                    return skuVO;
                }).sorted(Comparator.comparing(SkuVO::getCapacity).reversed())  //按库存量降序排序
                .collect(Collectors.toList());
    }

    @Override
    public Boolean hasCapacity(String innerCode, Long skuId) {
        var qw = new LambdaQueryWrapper<ChannelEntity>();
        qw
                .eq(ChannelEntity::getInnerCode, innerCode)
                .eq(ChannelEntity::getSkuId, skuId)
                .gt(ChannelEntity::getCurrentCapacity, 0);
        return channelService.count(qw) > 0;
    }

    @Override
    public VendingMachineEntity findByClientId(String clientId) {
        QueryWrapper<VendingMachineEntity> qw = new QueryWrapper<>();
        qw.lambda().eq(VendingMachineEntity::getClientId, clientId);
        return this.getOne(qw);
    }

    @Override
    public void supply(SupplyContract supplyContract) {
        //更新售货机上次补货时间
        this.update(Wrappers.<VendingMachineEntity>lambdaUpdate().set(VendingMachineEntity::getLastSupplyTime, LocalDateTime.now()).eq(VendingMachineEntity::getInnerCode, supplyContract.getInnerCode()));
        //更新售货机货道商品当前容量
        List<SupplyChannel> supplyData = supplyContract.getSupplyData();
        List<ChannelEntity> channeles = channelService.getChannelesByInnerCode(supplyContract.getInnerCode());
        List<ChannelEntity> channeleList = supplyData.stream().map(supplyChannel -> {
            for (ChannelEntity channel : channeles) {
                if (supplyChannel.getChannelId().equals(channel.getChannelCode()) && supplyChannel.getSkuId() == channel.getSkuId()) {
                    channel.setCurrentCapacity(channel.getCurrentCapacity() + supplyChannel.getCapacity());
                    channel.setLastSupplyTime(LocalDateTime.now());
                    return channel;
                }
            }
            return null;
        }).collect(Collectors.toList());
        channelService.updateBatchById(channeleList);
    }

    @Autowired

    private VendoutRunningService vendoutRunningService;

    @Autowired
    private MqttProducer mqttProducer;

    @Autowired
    private ConsulConfig consulConfig;

    @Autowired
    private RedisTemplate<String,String> redisTemplate;

    @Override
    public boolean vendOut(VendoutContract vendoutContract) {
        //根据售货机编号和商品编号，查询货道编号（有商品库存)
        List<ChannelEntity> channelEntityList = channelService.getChannelesByInnerCode(vendoutContract.getInnerCode());
        Optional<ChannelEntity> optionalChannel = channelEntityList.stream().filter(channelEntity -> channelEntity.getCurrentCapacity() > 0)
                .filter(channelEntity -> channelEntity.getSkuId() == vendoutContract.getVendoutData().getSkuId())
                .findFirst();
        //扣减货道库存
        if (optionalChannel.isPresent()){  //如果存在数据
            ChannelEntity channel = optionalChannel.get();
            channel.setCurrentCapacity(channel.getCurrentCapacity() - 1);
            channelService.updateById(channel);
            //-------------解锁售货机状态--------------
            DistributedLock lock = new DistributedLock(
                    consulConfig.getConsulRegisterHost(),
                    consulConfig.getConsulRegisterPort());
            String sessionId = (String)redisTemplate.boundValueOps(
                    VMSystem.VM_LOCK_KEY_PREF + vendoutContract.getInnerCode()
                            +"_"+ vendoutContract.getVendoutData().getSkuId() ).get();
            log.info("释放锁：{}",sessionId);
            lock.releaseLock(sessionId);
            //存入出货流水数据 （数据库表 tb_vendout_running ）,注意：status 要为false，要售货机终端上报结果后才改为true
            VendoutRunningEntity vendoutRunningEntity = vendoutRunningService.getOne(Wrappers.<VendoutRunningEntity>lambdaQuery().eq(VendoutRunningEntity::getOrderNo, vendoutContract.getVendoutData().getOrderNo()));
            if (vendoutRunningEntity != null){
                log.error("该订单出货流水数据已存在");
                return false;
            }
            vendoutRunningEntity = new VendoutRunningEntity();
            vendoutRunningEntity.setOrderNo(vendoutContract.getVendoutData().getOrderNo());
            vendoutRunningEntity.setInnerCode(vendoutContract.getInnerCode());
            vendoutRunningEntity.setStatus(false);
            vendoutRunningEntity.setSkuId(channel.getSkuId());
            vendoutRunningEntity.setSkuName(channel.getSku().getSkuName());
            vendoutRunningEntity.setPrice(channel.getPrice());
            vendoutRunningService.save(vendoutRunningEntity);
            //在出货协议中，加上货道编号，再通过EMQ发送给售货机终端 。主题：vm/售货机编号/vendout
            vendoutContract.getVendoutData().setChannelCode(channel.getChannelCode());
            try {
                mqttProducer.send(TopicConfig.getVendoutTopic(vendoutContract.getInnerCode()),2,vendoutContract);
                return true;
            } catch (JsonProcessingException e) {
                log.error("售货机微服务出货方法封装出货协议消息发送EMQ失败");
                return false;
            }
        }else {
            log.info("缺货,开始退款");
            //todo :通知退款
            return false;
        }
    }

    @Override
    public boolean vendOutResult(VendoutResultContract vendoutResultContract) {
        if (vendoutResultContract.isSuccess()){  //出货成功则 将出货记录表（ tb_vendout_running）的status更改为true
            VendoutRunningEntity vendoutRunningServiceOne = vendoutRunningService.getOne(Wrappers.<VendoutRunningEntity>lambdaQuery().eq(VendoutRunningEntity::getOrderNo, vendoutResultContract.getVendoutData().getOrderNo()));
            vendoutRunningServiceOne.setStatus(true);
            vendoutRunningService.updateById(vendoutRunningServiceOne);
            return true;
        }else {  //出货结果异常，则回滚库存
            ChannelEntity channelEntity = channelService.getOne(Wrappers.<ChannelEntity>lambdaQuery().eq(ChannelEntity::getChannelCode, vendoutResultContract.getVendoutData().getChannelCode()).eq(ChannelEntity::getInnerCode, vendoutResultContract.getInnerCode()));
            channelEntity.setCurrentCapacity(channelEntity.getCurrentCapacity() + 1);
            channelService.updateById(channelEntity);
            return false;
        }
    }


}
